Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
  • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
  • B05D5/02—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a matt or rough surface
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D1/00—Processes for applying liquids or other fluent materials
  • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
  • B05D1/12—Applying particulate materials
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D1/00—Processes for applying liquids or other fluent materials
  • B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
  • B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
  • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
  • B05D3/0254—After-treatment
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
  • B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
  • B05D7/06—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood
  • B05D7/08—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood using synthetic lacquers or varnishes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
  • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
  • B05D7/50—Multilayers
  • B05D7/52—Two layers
  • B05D7/54—No clear coat specified
  • B05D7/542—No clear coat specified the two layers being cured or baked together
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
  • B05D7/50—Multilayers
  • B05D7/56—Three layers or more
  • B05D7/57—Three layers or more the last layer being a clear coat
  • B05D7/576—Three layers or more the last layer being a clear coat each layer being cured, at least partially, separately
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
  • B05D7/50—Multilayers
  • B05D7/56—Three layers or more
  • B05D7/58—No clear coat specified
  • B05D7/582—No clear coat specified all layers being cured or baked together
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
  • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
  • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
  • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B38/00—Ancillary operations in connection with laminating processes
  • B32B38/14—Printing or colouring
  • B32B38/145—Printing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M1/00—Inking and printing with a printer's forme
  • B41M1/10—Intaglio printing ; Gravure printing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M1/00—Inking and printing with a printer's forme
  • B41M1/26—Printing on other surfaces than ordinary paper
  • B41M1/30—Printing on other surfaces than ordinary paper on organic plastics, horn or similar materials
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M1/00—Inking and printing with a printer's forme
  • B41M1/26—Printing on other surfaces than ordinary paper
  • B41M1/30—Printing on other surfaces than ordinary paper on organic plastics, horn or similar materials
  • B41M1/305—Printing on other surfaces than ordinary paper on organic plastics, horn or similar materials using mechanical, physical or chemical means, e.g. corona discharge, etching or organic solvents, to improve ink retention
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
  • B41M5/0011—Pre-treatment or treatment during printing of the recording material, e.g. heating, irradiating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
  • B41M5/0041—Digital printing on surfaces other than ordinary paper
  • B41M5/0047—Digital printing on surfaces other than ordinary paper by ink-jet printing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
  • B41M5/0041—Digital printing on surfaces other than ordinary paper
  • B41M5/0064—Digital printing on surfaces other than ordinary paper on plastics, horn, rubber, or other organic polymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B44—DECORATIVE ARTS
  • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
  • B44C5/00—Processes for producing special ornamental bodies
  • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D1/00—Processes for applying liquids or other fluent materials
  • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
  • B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
  • B05D1/06—Applying particulate materials
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D1/00—Processes for applying liquids or other fluent materials
  • B05D1/30—Processes for applying liquids or other fluent materials performed by gravity only, i.e. flow coating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D2203/00—Other substrates
  • B05D2203/20—Wood or similar material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D2203/00—Other substrates
  • B05D2203/22—Paper or cardboard
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D2401/00—Form of the coating product, e.g. solution, water dispersion, powders or the like
  • B05D2401/30—Form of the coating product, e.g. solution, water dispersion, powders or the like the coating being applied in other forms than involving eliminable solvent, diluent or dispersant
  • B05D2401/32—Form of the coating product, e.g. solution, water dispersion, powders or the like the coating being applied in other forms than involving eliminable solvent, diluent or dispersant applied as powders
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D2451/00—Type of carrier, type of coating (Multilayers)
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D2502/00—Acrylic polymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D2601/00—Inorganic fillers
  • B05D2601/20—Inorganic fillers used for non-pigmentation effect
  • B05D2601/26—Abrasives
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
  • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
  • B05D3/0218—Pretreatment, e.g. heating the substrate
  • B05D3/0227—Pretreatment, e.g. heating the substrate with IR heaters
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
  • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
  • B05D3/0254—After-treatment
  • B05D3/0263—After-treatment with IR heaters
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
  • B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
  • B05D7/06—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood
  • B05D7/08—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood using synthetic lacquers or varnishes
  • B05D7/10—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood using synthetic lacquers or varnishes based on cellulose derivatives
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
  • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
  • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
  • B32B2037/243—Coating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2255/00—Coating on the layer surface
  • B32B2255/08—Coating on the layer surface on wood layer
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2255/00—Coating on the layer surface
  • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2255/00—Coating on the layer surface
  • B32B2255/26—Polymeric coating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2255/00—Coating on the layer surface
  • B32B2255/28—Multiple coating on one surface
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/40—Properties of the layers or laminate having particular optical properties
  • B32B2307/408—Matt, dull surface
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2451/00—Decorative or ornamental articles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B44—DECORATIVE ARTS
  • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
  • B44C5/00—Processes for producing special ornamental bodies
  • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
  • B44C5/0407—Ornamental plaques, e.g. decorative panels, decorative veneers containing glass elements
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B44—DECORATIVE ARTS
  • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
  • B44C5/00—Processes for producing special ornamental bodies
  • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
  • B44C5/043—Ornamental plaques, e.g. decorative panels, decorative veneers containing wooden elements
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B44—DECORATIVE ARTS
  • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
  • B44C5/00—Processes for producing special ornamental bodies
  • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
  • B44C5/0469—Ornamental plaques, e.g. decorative panels, decorative veneers comprising a decorative sheet and a core formed by one or more resin impregnated sheets of paper
  • B44C5/0476—Ornamental plaques, e.g. decorative panels, decorative veneers comprising a decorative sheet and a core formed by one or more resin impregnated sheets of paper with abrasion resistant properties

Definitions

• the present invention relates to a method for producing a wood-based panel provided with a decoration, in particular with a wood-based panel provided with a structure that is synchronous with the decoration.
• wood-based panels in the furniture industry, as floor coverings or for cladding walls and ceilings, requires the surface of the wood-based panels to be processed or refined.
• the wood-based panels are usually coated with an impregnated decorative paper.
• an impregnated decorative paper There are no limits to the variety of different patterned decor papers, so that wood-based panels are available with a variety of different decors such as stone or wood decors.
• overlays are applied to the decorative paper. Thin papers are used as the overlay, which have typically already been impregnated with a melamine resin. Overlays are also available in which abrasion-resistant particles, such as corundum particles, are mixed into the resin of the overlay in order to increase the abrasion resistance of the laminate or the wood-based panel .
• thermosetting resin layers are applied to the decor applied by direct printing, which can contain abrasion-resistant particles to increase the wear resistance.
• a thermosetting resin layer is also called a liquid overlay.
• the thermosetting resin is preferably a formaldehyde-containing resin, particularly a melamine-formaldehyde resin and melamine-urea-formaldehyde resin.
• a method for producing the described liquid overlay layer is, inter alia, in EP 233 86 93 A1 described.
• a first upper resin layer containing corundum particles is applied to the wood-based panel, this first resin layer is dried, e.g.
• a second resin layer containing cellulose fibers is applied to the wood-based panel, repeated drying or drying of the second resin layer, for example to a residual moisture content of 3 to 6%, applying a resin layer containing at least third glass particles to the wood-based panel with subsequent drying of the third resin layer, for example also to a residual moisture content of 3 to 6% and a final pressing of the Layer structure under the influence of pressure and temperature.
• a liquid overlay the otherwise typically provided overlay paper can be dispensed with.
• the liquid overlay can be applied to both the top and the bottom of the wood-based panel.
• the present invention is therefore based on the technical problem of providing a method which enables wood-based panels to be produced in a space-saving and cost-effective manner.
• high abrasion values in particular of the abrasion classes AC4 to AC6, are to be achieved with at the same time low pressure plate wear.
• a method for producing wood-based panels is thus provided in which the use of liquid resin for the layer structure is dispensed with and resin powder is used instead.
• WO 2013/032387 A1 describes a process for the production of coated wood-based panels provided with a decoration, wherein in one embodiment a powdery layer comprising wood fibers and a resin are applied to a wood-based panel, then a paper is applied to this layer, which is printed and coated with a powdery overlay layer comprising fibers , Resin and abrasion-resistant particles and then pressed.
• US 2013/0273244 A1 also describes a method for producing a wood-based panel, a mixture of wood particles, a solvent, a binding agent and additives being applied as a powder to a wood-based substrate after a drying step. In both cases, however, neither a primer layer nor a primer layer is applied to a resin powder layer before direct printing.
• the powdery resin is applied to the wood-based panel in an amount of 10 to 50 g / m 2 , preferably 15 to 30 g / m 2 , particularly preferably 20 to 25 g / m 2.
• This amount of resin powder applied essentially applies to all resin powder layers to be applied, whereby these can be adapted in each case.
• the scattering density is selected in such a way that covering layers are generated in each case.
• the particle size of the powdery resin is between 20 and 100 ⁇ m, preferably between 40 and 89 ⁇ m.
• the powdery resin to be applied is a formaldehyde resin, preferably a urea resin, a melamine resin or a phenolic resin, particularly preferably a melamine-formaldehyde resin. It is preferable if a melamine resin or a urea resin is used for the first resin layer. Only melamine resin is preferably used in the upper layers.
• “Melting” or “gelling” in the context of the present application means that the resin layer is not yet completely polymerized, but rather the polymerization is stopped at an intermediate stage in which further crosslinking or polymerization is still possible at a later processing time.
• the meaning of "gelling” is thus usually based on the fact that at a later point in time further functional layers are to be applied to the protective layer that has already been applied or the product would only be finished in further processing steps.
• salting, thickening, settling, curing-influencing effects, etc. substances that are poorly compatible with liquid melamine resin can be used. These can be salts to increase conductivity, organic or inorganic flame retardants, cellulose derivatives, radical scavengers, pigments, UV absorbers, etc.
• the powdery resin used can contain additives such as pigments, conductive substances and cellulose.
• the layer of the melted resin powder can simultaneously serve as a white primer layer for the decorative layer to be subsequently printed.
• White pigments such as titanium dioxide TiO 2 can be used as color pigments.
• Further color pigments can be calcium carbonate, barium sulfate or barium carbonate. The proportion of color pigments can be up to 50% by weight of the total amount of powder.
• the addition of color pigments to the first layer of resin powder increases the covering power so that it can be used as the (sole) base or primer for the subsequent decorative layer.
• the amount of cellulose fibers that is applied with the resin powder can be between 0.1 and 1% by weight, preferably between 0.5 and 0.8% by weight (based on the amount of resin to be applied) or between 0.1-0.5 g / m 2 , preferably 0.2-0.4 g / m 2 , particularly preferably 0.25 g / m 2 .
• the cellulose fibers used with preference are colorless and are in the form of a fine or granular, slightly hygroscopic powder.
• the conductive substances can be selected from the group comprising soot, carbon fibers, metal powder and nanoparticles, in particular carbon nanotubes. Combinations of these substances can also be used.
• the resins used preferably each contain additives such as hardeners, wetting agents (surfactants or mixtures thereof), release agents and / or other components.
• the resin powder is applied by means of electrostatic charging.
• the application can also be carried out by means of powder coating using the tribo process.
• the powder to be applied is charged by friction.
• the applied layer of powdery resin can be melted using an IR radiator, or microwave systems or the like.
• IR radiators is particularly preferred.
• the surface of the wood-based panel can be pretreated before printing to improve the adhesion of the subsequent layers.
• This can be cleaning with brushes, a bevel that also removes unevenness from the surface, and / or a plasma or corona treatment.
• At least one primer is applied to the (first) melted resin powder layer to increase the covering power.
• the primer preferably comprises casein, corn starch or soy protein and can contain inorganic color pigments and thus serve as a primer layer for the decorative layer to be subsequently printed on.
• White pigments such as titanium dioxide TiO 2 can in turn be used as color pigments.
• Further color pigments can be calcium carbonate, barium sulfate or barium carbonate, but also iron oxide pigments (for a brownish primer).
• the primer can also contain water as a solvent.
• the amount of liquid primer applied can be between 10 and 50 g / m 2 , preferably between 15 and 30 g / m 2 , particularly preferably between 20 and 25 g / m 2 .
• the primer consists of at least one, preferably of at least two or more successively applied layers or orders (e.g. up to five orders), the amount applied between the layers or orders being the same or different, ie the amount applied each individual layer can vary.
• the primer can be applied to the wood-based support plate using a roller, followed by drying. It is also possible to apply the primer to the plastic carrier plate using digital printing.
• the digital printing inks used for digitally printing the primer are preferably based on UV inks that are enriched with white color pigments. However, it is also possible to use water-based digital printing inks or so-called hybrid inks. An order using digital printing is advantageous because the printing system is significantly shorter than a roller device and thus saves space, energy and costs.
• a primer layer is applied to the primer, preferably as a single application with subsequent drying.
• the primer layer is particularly useful in the case of a subsequent gravure printing process (with rollers), whereas this is not absolutely necessary when using a digital printing process.
• the amount of the applied liquid primer is between 10 and 30 g / m 2 , preferably between 15 and 20 g / m 2 .
• Polyurethane-based compounds are preferably used as primers.
• Rotogravure and digital printing processes are advantageously used as direct printing processes for printing the wood-based panel.
• Gravure printing is a printing technique in which the elements to be imaged are present as depressions in a printing form that is colored before printing.
• the printing ink is primarily located in the depressions and is transferred to the object to be printed, such as a carrier material, due to the contact pressure of the printing form and adhesive forces.
• a carrier material such as a carrier material
• the at least one decoration is applied to the (surface-treated and precoated) carrier plate by means of a digital printing process.
• digital printing the print image is transferred directly from a computer to a printing machine, such as a laser printer or inkjet printer.
• the decor is printed according to the inkjet principle in a single pass, in which the entire width of the upper side to be printed is spanned, with the plates being moved under the printer.
• the carrier plate it is also possible for the carrier plate to be printed to be stopped under the printer and for the printer to run over the surface at least once during printing.
• the printing inks are combined in separate rows of print heads, with one or two rows of print heads being provided for each color.
• the colors of the digital printing inks are, for example, black, blue, red, reddish yellow, greenish yellow, CMYK can also be used as an option.
• the digital printing inks are optionally based on the same pigments that are used for analog and / or digital printing with water-based inks.
• the digital printing inks are preferably based on UV inks. However, it is also possible to use water-based digital printing inks or so-called hybrid inks. After printing, the decorative print is dried and / or irradiated.
• the printing inks are applied in an amount between 1 and 30 g / m 2 , preferably between 3 and 20 g / m 2 , particularly preferably between 3 and 15 g / m 2 .
• the markings required for alignment in the press are also printed together with the decor.
• the further powder resin layer applied and fused in step c) of the present method preferably comprises powder based on formaldehyde resin, particularly preferably melamine-formaldehyde resin.
• the amount of resin powder applied in this step is between 10 and 50 g / m 2 , preferably between 20 and 40 g / m 2 .
• additives such as conductive substances or cellulose and additives such as hardeners, wetting agents or release agents can also be added to the resin powder in this process step.
• the melting or gelling takes place here also preferably using an IR radiator.
• the applied and melted resin powder layer serves in this case as a protective layer, which on the one hand serves to protect the printed surface in the event of intermediate storage and on the other hand (due to the not yet completely hardened Resin layer) enables further processing.
• certain work steps must be decoupled for reasons of cost, technology, etc.
• linked production lines can differ greatly in terms of their productivity.
• buffer storage must be built in which materials are stacked on top of each other.
• multiple runs may be necessary in a production line because order quantities etc. cannot be realized in one run.
• dried or partially hardened surfaces are advantageous, as they enable protection of the printed surface in the event of temporary storage and further processing.
• abrasion-resistant particles are uniformly sprinkled onto the decorative layer or the resin powder layer applied in step c) (step d).
• Corundum aluminum oxide
• boron carbide silicon dioxide
• silicon carbide particles can be used as abrasion-resistant particles.
• Corundum particles are particularly preferred. This is preferably a high-grade corundum (white) with a high level of transparency, so that the visual effect of the underlying decoration is adversely affected as little as possible. Corundum has an uneven spatial shape.
• the amount of abrasion-resistant particles scattered on is 7 to 50 g / m 2 , preferably 10 to 30 g / m 2 , particularly preferably 15 to 25 g / m 2 .
• the amount of abrasion-resistant particles scattered on depends on the abrasion class to be achieved and the grain size.
• the amount of abrasion-resistant particles in the case of abrasion class AC3 is in the range between 10 to 15 g / m 2 , in abrasion class AC4 between 15 to 20 g / m 2 and in abrasion class AC5 between 20 to 35 g / m 2 when used the grit F200.
• the finished panels preferably have abrasion class AC4.
• Abrasion-resistant particles with grain sizes in classes F180 to F240, preferably F200, are used.
• the grain size of class F180 covers a range from 53 - 90 ⁇ m, F220 from 45-75 ⁇ m, F230 34-82 ⁇ m, F240 28-70 ⁇ m (FEPA standard).
• white aluminum oxide F180 to F240 preferably in a main grain range of 53-90 ⁇ m, are used as abrasion-resistant particles.
• corundum particles of classes F180-220 are used.
• the abrasion-resistant particles must not be too fine-grained (risk of dust formation), but also not too coarse-grained. The size of the abrasion-resistant particles is therefore a compromise.
• silanized corundum particles can be used.
• Typical silanizing agents are aminosilanes.
• At least one third layer of at least one powdery resin (step e), in particular on the layer of abrasion-resistant particles, is applied.
• This layer serves as a separating layer to block off the abrasion-resistant particles.
• the powder resin layer applied and fused in this step e) preferably comprises powder based on formaldehyde resin, particularly preferably melamine-formaldehyde resin.
• the amount of resin powder applied in this step is between 10 and 50 g / m 2 , preferably between 20 and 40 g / m 2 .
• additives such as conductive substances or cellulose and additives such as hardeners, wetting agents or release agents can also be added to the resin powder in this process step.
• the melting or gelling takes place here also preferably using an IR radiator.
• glass spheres are sprinkled on, in particular on the at least one third melted resin powder layer (step f).
• the glass spheres act as spacers between abrasion-resistant particles and the subsequent press plate. In this way, the sheet metal wear can be at least partially reduced.
• the glass spheres used with preference have a diameter of 60-120 ⁇ m, preferably 80-90 ⁇ m.
• the diameter of the glass spheres is matched to the average particle size of the abrasion-resistant particles used in order to ensure an optimal barrier to the subsequent press plate.
• glass spheres with a diameter between 70-90 ⁇ m are used, and in the case of corundum F180 glass spheres with a diameter between 80-120 ⁇ m are used.
• the amount of glass spheres is 5 to 30 g / m 2 , preferably 8 to 20 g / m 2 , particularly preferably 8 to 15 g / m 2 .
• the glass spheres can also be present in silanized form. By silanizing the glass beads, the embedding of the glass beads in the resin matrix is improved.
• This layer serves to block off the glass spheres and as a finishing layer.
• the fourth powder resin layer applied and fused in this step g) preferably comprises powder based on formaldehyde resin, particularly preferably melamine-formaldehyde resin.
• the amount of resin powder applied in this step is between 10 and 50 g / m 2 , preferably between 20 and 40 g / m 2 .
• additives such as conductive substances or cellulose and additives such as hardeners, wetting agents or release agents can also be added to the resin powder in this process step.
• the melting or gelling takes place here also preferably using an IR radiator.
• the layer structure is pressed in a short-cycle press (KT press).
• KT press short-cycle press
• the pressing step takes place under the influence of pressure and temperature at temperatures between 180 and 250 ° C, preferably between 200 and 230 ° C, in particular preferably at 200 ° C. and a pressure between 30 and 60 kg / cm 2 , particularly preferably between 40 and 50 kg / cm 2 .
• the pressing time is between 8 and 30 seconds, preferably between 10 and 25 seconds.
• the coated wood-based panel is preferably aligned in the short-cycle press with a structured press plate located in the short-cycle press using markings on the wood-based panel, so that congruence between the decoration on the wood-based panel and the structure of the press plate to be embossed is produced.
• This enables the creation of a decor-synchronous structure.
• the melamine resin layers melt and a laminate is formed by a condensation reaction including the components corundum / glass / fibers.
• a counter-tension for example made of several resin layers without additives or a counter-tension paper, can be applied. Through this this ensures that the tensile forces on the wood-based panel that arise during the pressing process cancel each other out.
• the layer structure and the respective layer thickness of the backing applied to the underside approximately correspond to the layer sequence applied to the upper side, but without the addition of the additives, abrasion-resistant particles or glass spheres.
• An impregnation material can also be used as a counterbalance.
• the at least one wood-based panel is a medium-density fiber (MDF), high-density fiber (HDF) or chipboard or coarse chipboard (OSB) or plywood panel and / or a wood-plastic panel.
• MDF medium-density fiber
• HDF high-density fiber
• OSB coarse chipboard
• the present method thus enables the production of a wear-resistant wood-based panel provided with a decorative layer and having a resin structure with abrasion-resistant particles.
• the wood-based panel comprises at least one decorative layer on the top and a multi-layer resin structure containing abrasion-resistant particles, optionally cellulose fibers and glass spheres, the multi-layer resin structure being one Total layer thickness between 60 and 200 ⁇ m, preferably between 90 and 150 ⁇ m, particularly preferably between 100 and 120 ⁇ m.
• the present method enables the production of an abrasion-resistant wood-based panel with the following layer structure (viewed from bottom to top): optional counter-pull - wood-based panel - first resin layer made of melted resin powder - primer layer - primer layer printed decorative layer - second resin layer made of melted resin powder (protective layer).
• the present method enables the production of an abrasion-resistant wood-based panel with the following layer structure (viewed from bottom to top): optional backing - wood-based panel - first resin layer made of melted resin powder - primer layer - primer layer - printed decorative layer - layer made of abrasion-resistant particles - second resin layer made of melted resin Resin powder (protective layer).
• the present method enables the production of an abrasion-resistant wood-based panel with the following layer structure (viewed from bottom to top): optional counter-pull - wood-based panel - first resin layer made of melted resin powder - primer layer - primer layer - printed decorative layer - second resin layer made of melted resin powder (protective layer) - layer made of abrasion-resistant particles - third resin layer made of melted resin powder (separating layer) - glass spheres (spacers) - fourth resin layer made of melted resin powder (final layer).
• the protective layer serves to cover the decoration and to protect the decoration during intermediate storage (stacking, storage, transport).
• the other layers of resin on the top form an overlay that protects the finished laminate against abrasion and enables structuring that is synchronized with the decor.
• Tribo guns can be used as the devices for applying the resin powder layers provided in the present production line.
• the scattering device for the abrasion-resistant particles and glass balls provided in the present production line is suitable for scattering powder, granules, fibers and includes an oscillating brush system.
• the spreading device essentially consists of a storage hopper, a rotating, structured roller and a scraper. The amount of abrasion-resistant material applied is determined by the speed of rotation of the roller.
• the spreading device preferably comprises a spiked roller.
• the at least one spreading device is surrounded or is arranged in at least one booth which is provided with at least one means for removing dusts occurring in the booth.
• the means for removing the dusts can be designed in the form of a suction device or also as a device for blowing in air.
• the injection of air can be achieved via nozzles that are installed at the plate inlet and outlet and blow air into the booth. In addition, these can prevent air movements from creating an inhomogeneous curtain of abrasion-resistant material.
• the removal of the dust from abrasion-resistant material from the vicinity of the spreading device is advantageous because, in addition to the obvious health risks for the workers working on the production line, the fine dust from abrasion-resistant particles is also deposited on other parts of the production line and leads to increased wear and tear of the same.
• the arrangement of the spreading device in a cabin therefore not only serves to reduce the dust pollution of the area around the production line, but also prevents premature wear.
• the scattering device is preferably controlled by a light barrier, the light barrier being arranged in the processing direction in front of the roller (scattering roller) provided below the scattering device.
• the control of the spreading device by a light barrier makes sense because there are more or less large gaps between the individual wood-based panels. This starts the spreading process as soon as a plate is in front of the spreading roller.
• At least one funnel is provided in front of the spreading roller to collect excess abrasion-resistant particles (i.e. not scattered on the at least one wood-based panel, but rather before the wood-based panel is inserted with the aid of the transport device under the spreading roller in front of the same, abrasion-resistant particles that fall down) .
• the funnel is coupled to at least one conveyor device and a screening device, the excess abrasion-resistant material collected in the funnel being transported to the screening device via the conveyor device.
• the sieve mesh of the sieve device corresponds to the largest grain of abrasion-resistant particulate material used (i.e. approx. 80-100 ⁇ m).
• dirt particles and clumped material are separated from the collected abrasion-resistant material and the sieved abrasion-resistant material can be returned to the spreader (recycled).
• the hardener is also made for the hardener to be mixed into the liquid resin in a targeted manner at the corresponding application units or application devices for the various resin layers.
• at least one metering system is provided for adding the hardener to each application device.
• the hardener is fed into the reservoir from the at least one metering system pumped for the resin and mixed in the reservoir with the resin, for example by means of a suitable agitator
• melamine resin powder In an application device, they are then coated with melamine resin powder in an amount of 25 g / m 2 with the aid of tribo guns.
• the melamine resin powder contained the usual auxiliaries such as hardeners, release agents, etc. The powder is then melted using infrared radiation.
• the primed board is coated in multiple applications with a colored primer with subsequent intermediate drying (circulating air).
• the color primer is a mixture of casein and pigment (titanium dioxide).
• the application quantity per application is approx. 5 g b / m 2 .
• the job is repeated at least five times.
• a primer is then applied (application quantity: 10-20 g fl./m 2 ) with circulating air drying.
• the plate is printed with the help of rollers or a digital printer.
• the application quantities of paint are 3 to 15 g fl. / M 2 .
• the paint is dried over IR radiation or circulating air.
• Corundum is sprinkled onto the print using a scattering device (application rate: 20 g corundum / m 2 , F 180).
• melamine resin powder is again applied with a tribo gun (application quantity: 80 g / m 2 ).
• This melamine resin powder is gelled again with the help of an IR radiator.
• the melamine resin powder contained the usual auxiliaries such as hardeners, release agents, etc.
• the plate is then pressed together with a counter-tension impregnate in a KT press.
• the pressed plate was then inspected visually, and no abnormalities were found.
• the Surface tests subsequently carried out in accordance with DIN EN 15468 - August 2018 also showed no abnormalities. All requirements of exposure class 32 were met.
• urea resin powder In an application device, they are then coated with urea resin powder in an amount of 25 g / m 2 with the aid of tribo guns.
• the urea resin powder contained the usual auxiliaries such as hardeners, release agents, etc.
• the powder is then melted using infrared radiation.
• the primed board is coated in multiple applications with a colored primer with subsequent intermediate drying (circulating air).
• the color primer is a mixture of casein and pigment (titanium dioxide).
• the application quantity per application is approx. 5 g b / m 2 .
• the job is repeated at least five times.
• a primer is then applied (application quantity: 10-20 g fl./m 2 ) with circulating air drying.
• the plate is printed with the help of rollers using the gravure printing process or a digital printer.
• the application quantities of paint are 3 to 15 g fl. / M 2 .
• the paint is dried over IR radiation or circulating air.
• Corundum is sprinkled onto the print using a scattering device (application rate: 20 g corundum / m 2 , F 180).
• melamine resin powder is again applied with a tribo gun (application quantity: 80 g / m 2 ).
• This melamine resin powder is gelled again with the help of an IR radiator.
• the melamine resin powder contained the usual auxiliaries such as hardeners, release agents, etc.
• the plate is then pressed together with a counter-tension impregnate in a KT press.
• the pressed plate was then inspected visually, and no abnormalities were found.
• the surface tests subsequently carried out in accordance with DIN EN 15468 - August 2018 also showed no abnormalities. All requirements of exposure class 32 were met.
• 8 mm HDF are separated, freed from dust with the help of brushes and then transported onwards via roller transports.
• melamine resin powder In an application device, they are then coated with melamine resin powder in an amount of 25 g / m 2 with the aid of tribo guns.
• the melamine resin powder contained the usual auxiliaries such as hardeners, release agents, etc. The powder is then melted using infrared radiation.
• the primed board is coated in multiple applications with a colored primer with subsequent intermediate drying (circulating air).
• the color primer is a mixture of casein and pigment (titanium dioxide).
• the application quantity per application is approx. 5 g b / m 2 .
• the job is repeated at least five times.
• a primer is then applied (application quantity: 10-20 g fl./m 2 ) with circulating air drying.
• the plate is printed with the help of rollers or a digital printer.
• the application quantities of paint are 3 to 15 g fl. / M 2 .
• the paint is dried over IR radiation or circulating air.
• Melamine resin powder is then applied again with a tribo gun (application rate: 30 g / m 2 ). This melamine resin powder is gelled again with the help of an IR radiator.
• Corundum is sprinkled onto this resin layer using a scattering device (application rate: 20 g corundum / m 2 , F 180).
• melamine resin powder is again applied with a tribo gun (application quantity: 50 g / m 2 ).
• the melamine resin powder contained approx. 5% by weight of cellulose (J. Rettenmaier & Sons, Vivapur 302). This melamine resin resin powder is gelled again with the help of an IR radiator.
• the melamine resin powder contained the usual auxiliaries such as hardeners, release agents, etc.
• glass spheres in an amount of approx. 8 g / m 2 were scattered on with a scattering device.
• Melamine resin powder is applied again with the aid of tribo guns (application rate: 40 g / m 2 ).
• the melamine resin powder contains the usual auxiliaries.
• the resin is gelled again with the aid of an IR radiator.
• the plate is then pressed together with a counter-tension impregnate in a KT press.
• the pressed plate was then inspected visually, and no abnormalities were found.
• the surface tests subsequently carried out in accordance with DIN EN 15468 - August 2018 also showed no abnormalities. All requirements of exposure class 32 were met.
• melamine resin powder In an application device, they are then coated with melamine resin powder in an amount of 25 g / m 2 with the aid of tribo guns.
• the melamine resin powder contained the usual auxiliaries such as hardeners, release agents, etc.
• the resin contained 3% by weight of carbon nanotubes. The powder is then melted using infrared radiation.
• the primed board is coated in multiple applications with a colored primer with subsequent intermediate drying (circulating air).
• the color primer is a mixture of casein and pigment (titanium dioxide).
• the application quantity per application is approx. 5 g b / m 2 .
• the job is repeated at least five times.
• a primer is then applied (application quantity: 10-20 g fl./m 2 ) with circulating air drying.
• the plate is printed with the help of rollers or a digital printer.
• the application quantities of paint are 3 to 15 g fl. / M 2 .
• the paint is dried over IR radiation or circulating air.
• Melamine resin powder is then applied again with a tribo gun (application rate: 30 g / m 2 ). This melamine resin powder is gelled again with the help of an IR radiator.
• Corundum is sprinkled onto the resin layer using a scattering device (application rate: 20 g corundum / m 2 , F 180).
• melamine resin powder is again applied with a tribo gun (application quantity: 50 g / m 2 ).
• the melamine resin powder contained approx. 5% by weight of cellulose (J. Rettenmaier & Sons, Vivapur 302). This melamine resin resin powder is gelled again with the help of an IR radiator.
• the melamine resin powder contained the usual auxiliaries such as hardeners, release agents, etc.
• glass spheres in an amount of approx. 8 g / m 2 were scattered on with a scattering device.
• Melamine resin powder is applied again with the aid of tribo guns (application rate: 40 g / m 2 ).
• the melamine resin powder contains the usual auxiliaries.
• the resin is gelled again with the aid of an IR radiator.
• the plate is then pressed together with a counter-tension impregnate in a KT press.
• the pressed plate was then inspected visually, and no abnormalities were found.
• the surface tests subsequently carried out in accordance with DIN EN 15468 - August 2018 also showed no abnormalities. All requirements of exposure class 32 were met. A measurement of the surface resistance gave a value of 7.8 x10 8 ⁇ .

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